DE102018101541B4 - Door for opening and closing a discharge opening of a rubber kneader - Google Patents

Abstract

A door (32) which opens and closes a discharge port (37) formed in a bottom part of a chamber (31) of a rubber kneader (100) and a side of which inserted into the chamber (31) has a symmetrical mountain shape, characterized in that the Mountain-shaped external shape (1) when viewed in a longitudinally rectangular cross section is shaped so as to extend from a door end lower corner part (32a) which is in contact with an inner opening end of the discharge port (37) to a door upper part ( 32b) towards which is the highest in a vertical direction, has an arc (1a) which is deepened downward until it reaches a middle portion, and a plurality of straight lines (1b, 1c) which are between the middle section and the upper door part (32b) are inclined at different angles in a horizontal direction.

Description

BACKGROUND

1. Field of the Invention

The invention relates to a door which is provided in a discharge port formed in a bottom part of a chamber of a rubber kneader and which opens and closes the discharge port.

2. Description of the Prior Art

Such a type of door is used, for example, in the JP 2 562 396 B2 , JP H08-332 630 A, U.S.A. 4,184,773 , the U.S.A. 4,620,793 , the DE 10 2017 131 307 A1 and JP H05-4224A.

The one in the JP 2 562 396 B2 described door (unloading door) has a shape defined as follows. On lines (L ₁₎ and (L _2), which in a closed mixing chamber contact points (D) and (E) a discharge port and a discharge door with centers of rotation (A) and (B) connecting a kneading rotor, is in each case a center (Q) a radius (S) provided. With the center (Q) set as a fulcrum, arcs are drawn passing through the contact points (D) and (E). An intersection of the arcs is set as a peak (P) of the discharge door. The tip shape of the discharge door is designed such that the tip (P) does not interfere with the contact point (D) and the tip of the rotating kneading rotor when the arc of radius (R) is drawn with a center of rotation (O) of the discharge door set as the fulcrum, and the center (Q) is as close as possible to the centers of rotation (A) and (B) of the kneading rotor.

Like in the JP 2 562 396 B2 describes, with the above-described discharge door, the mixture in the closed mixing chamber can be kneaded efficiently, and although a slightly sticky mixture is kneaded, the mixture can be easily and efficiently discharged while preventing the entire mixture from being discharged during discharge , so that it is pinched between the peripheral edge part of the discharge port and the discharge door or adheres to a gap between the peripheral edge part of the discharge port and the discharge door.

The door (ejection door) described in JP H08-332630A has a shape defined as follows. A ratio a (=h/R) of a height h of the ejection door and a radius R of the chamber are set in a range of 0.6≦a≦0.8.

As described in JP H08-332630A, with the ejection door described above, the mixing and dispersing effect in a kneading chamber is improved, so that a uniform kneaded substance is obtained in a short time. Also, since the space formed in the upper part of the ejection door and the rotor is small, stagnation, adhesion or the like of a compounding agent or a kneading target substance is reduced.

In some cases, the rubber kneader is filled with sheet rubber (rubber sheet) as a kneading target material to be kneaded. The rubber sheet can be rolled and wound onto the rotor (kneading rotor) in the solid state (sheet-like state) at the start-up time when the rubber sheet is filled in the chamber.

At each of the JP 2 562 396 B2 and JP H08-332630 A, the entire inclined surface in contact with the rubber on the kneading chamber side is formed as a curved surface which is smooth throughout. Incidentally, in the door described in JP H08-332630A, the small portion of its upper part is formed as a straight line extending in a horizontal direction. In the case of the door having such a shape, the rubber is suppressed from sticking to the door. However, in a case where the kneading target material is a rubber sheet, the rubber hardly backs up in the door portion. For this reason, the rubber skin is slightly rolled into the rotor.

EXECUTIVE SUMMARY

The invention was made in consideration of the above situation, and an object thereof is to provide a door which suppresses rubber as a kneading target from being rolled into a rotor and which opens and closes a discharge port of a rubber kneader.

The invention is a door which opens and closes a discharge port formed in a bottom part of a chamber of a rubber kneader and a side of which inserted into the chamber has a symmetrical mountain shape. In the door, the mountain-shaped outer shape when viewed in a longitudinally rectangular cross section is designed so that it extends from a door-end lower corner part that is in contact with an inner opening end of the discharge port toward a door upper part that is in a vertical direction is highest, an arc which is deepened downwards until it reaches a central section, and has a plurality of straight lines extending between the central section and the upper door part in a horizontal direction at different angles are inclined.

With the door configured as above, the rubber can be dammed up in the chamber near the door to some extent, and thus the rubber can be suppressed from being rolled into the rotor.

character list

• 1 eine Schnittansicht, die einen Kautschukkneter darstellt, der eine Tür gemäß einem Ausführungsbeispiel der Erfindung aufweist;
• 2 eine Ansicht, die eine äußere Form (hauptsächlich eine Seite) eines bergförmigen Abschnitts der Tür gemäß einer Vielzahl von Ausführungsbeispielen darstellt, die die in 1 dargestellte Tür einschließen;
• 3 eine Ansicht, um ein Verfahren zu erläutern, bei dem in einem Bereich von 0 ≤ x ≤ 0,5L eine äußere Form (Bogen) der Tür aufgetragen wird;
• 4 eine Ansicht, um ein Verfahren zu erläutern, bei dem in einem Bereich von 0,75L ≤ x ≤ L eine äußere Form (Gerade) der Tür aufgetragen wird;
• 5 eine Schnittansicht, die gemäß einem Ausführungsbeispiel der Erfindung einen in Längsrichtung mittleren Abschnitt der Tür darstellt; und
• 6 eine Schnittansicht, die gemäß dem einen Ausführungsbeispiel der Erfindung die Tür in einer Richtung entlang der Längsrichtung darstellt.

A better understanding of the invention will be obtained from the following detailed description and the accompanying drawings, which are intended for purposes of illustration only and are not intended to be limiting of the invention. Show it:

• 1 12 is a sectional view showing a rubber kneader having a door according to an embodiment of the invention;
• 2 FIG. 14 is a view showing an outer shape (mainly a side) of a mountain-shaped portion of the door according to a variety of embodiments that are the subject of FIG 1 include pictured door;
• 3 12 is a view for explaining a method in which an outer shape (arc) of the door is applied in a range of 0≦x≦0.5L;
• 4 12 is a view for explaining a method in which an outer shape (straight line) of the door is drawn in a range of 0.75L≦x≦L;
• 5 12 is a sectional view showing a longitudinally central portion of the door according to an embodiment of the invention; and
• 6 12 is a sectional view showing the door in a direction along the longitudinal direction according to the one embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

An exemplary embodiment of the invention is described below with reference to the drawings.

Design rubber kneader

With reference to 1 the configuration of a rubber kneader 100 having a door 32 according to an embodiment of the invention is described. Incidentally, the rubber, which is a kneading target of the rubber kneader having the door of the present invention, is not limited to rubber (rubber sheet) having a sheet-like shape.

The rubber kneader 100 is an apparatus that performs kneading on rubber, which is a kneading target material, and has a feeding part 20 and a kneading part 30 . The feeding part 20 is a portion that feeds a kneading target material into the kneading part 30 and has a hopper 21 , a material feeding cylinder 22 and a cylinder device 23 .

The rubber (kneading target material) of the kneading target is charged into the hopper 21 from the outer part of the rubber kneader 100 . The material feed cylinder 22 is a cylinder through which the kneading target material can pass. The upper part of the material feeding cylinder 22 communicates with the hopper 21.

The cylinder device 23 is a device that presses the kneading target material from the material feed cylinder 22 into the kneading part 30 (the kneading chamber 33 to be described). For example, the cylinder device 23 is a pneumatic actuator. The cylinder device 23 has a cylinder 24 , a piston 25 , a piston rod 26 and a falling weight 27 .

The falling weight 27 connected to the lower end portion of the piston rod 26 is a member which presses the kneading target material charged into the kneading chamber 33 from the hopper 21 .

The kneading part 30 is a portion that kneads the kneading target material, and has a chamber 31, a door 32 that opens and closes a discharge port 37 formed in the bottom part of the chamber 31, and a pair of rotors 34 and 35 (kneading rotor).

The chamber 31 is a portion in which the kneading chamber 33 is formed, and a feed opening 36 of the kneading target material is provided in its upper part. The drop weight 27 is lowered from the upper side thereof to the feed port 36 portion.

The kneading chamber 33 is a space where the kneading target material is kneaded. The longitudinal sectional shape of the kneading chamber 33 is a cocoon shape. The longitudinal sectional shape is the sectional shape of the kneading chamber 33 when viewed from the axis direction of the rotors 34 and 35.

The door 32 is driven by an actuator to open and close the discharge port 37 of the chamber 31 . The discharge port 37 of the chamber 31 is closed by the door 32 during kneading of the kneaded target material, and is opened when the rubber (kneaded substance) that has been kneaded is discharged from the chamber 31 . The actuator that drives the door 32 is, for example, a torque drive (rotary actuator). The door 32 (the shape of the door) has a large effect on the degree of kneading of the rubber kneaded by the rotors 34 and 35 in the chamber 31 (in the kneading chamber 33).

The rotors 34 and 35 are components which knead the kneading target material and which are arranged in the chamber 31 (in the kneading chamber 33). The rotors 34 and 35 rotate about their central shaft. The centers of rotation C of the rotors 34 and 35 are in 1 shown. The rotors 34 and 35 rotate in directions different from each other such that their facing portions move downward.

door shape

The door 32 will now be described in detail. The door 32 is formed such that a side inserted into the chamber 31 has a mountain shape. Incidentally, the mountain shape is a symmetrical shape in a sectional view perpendicular to a longitudinal direction of the door 32 .

For example, see the section of door 32 in 1 and an outer shape 1 in 2 . In the door 32 according to the embodiment of the present invention, the mountain-shaped outer shape 1, when viewed in a longitudinally rectangular cross section, is configured so as to extend from a door end lower corner part 32a, which is in contact with the inner opening end of the discharge port 37, to a upper door part 32b which is highest in the vertical direction, has an arc 1a which is deepened downward until it reaches a middle portion, and two straight lines 1b and 1c extending between the middle portion and the upper door part 32b are inclined at different angles with respect to a horizontal direction. That is, in the outer shape 1 of the mountain-shaped portion of the door 32, the one arc 1a and the two straight lines 1b and 1c are formed between the door-end corner lower part 32a and the door upper part 32b from the door-end lower corner part 32a toward the door upper part 32b. 2 Incidentally, Fig. 14 is a view showing the outer shape (mainly only one side) of the mountain-shaped portion of the door when viewed in a longitudinally rectangular cross section. Also, the one-dot-dash line is in 2 a center line.

In 2 According to the exemplary embodiment according to the invention, a total of nine door shapes from the outer shape 1 to an outer shape 9 are shown. As in 2 1 to 9 between the lower door end corner part 32a and the upper door part are all formed such that they have one of arcs 1a to 9a and two of straight lines 1b to 9b and 1c to 9c from the lower door end corner portion 32a to the upper door portion. The outer shape of the door that is in 2 Incidentally, represented by the dashed line labeled "Prior Art" is a curved surface which is smooth throughout except for the upper door portion. Incidentally, the small portion of the door upper according to the prior art is formed as a straight line extending in the horizontal direction.

Regarding the total of nine doors that the in 2 have external forms 1 to 9 shown, and the door having the in 2 having the prior art shape shown, the inventors evaluated the rolling of the rubber into the rotors 34 and 35 and the adhesiveness of the rubber to the door. Table 1 shows an evaluation result. Incidentally, the rubber as the kneading target material is a rubber (rubber sheet) in which the original shape (the shape at the time of filling) is a sheet shape. - Table 1 - door rolling in liability State of the art × ◯ Outer shape 1 ◯ △ Outer shape 2 ◯ ◯ Outer shape 3 ◯ ◯ Outer shape 4 ◯ ◯ Outer shape 5 ◯ × Outer shape 6 ◯ ◯ Outer shape 7 ◯ ◯ Outer shape 8 ◯ ◯ Outer shape 9 ◯ ◯
Explanation Table 1
rolling in
◯: Roll-in suppressing effect is achieved
×: Roll-in suppressing effect is not obtained
liability
◯: no liability
×: exceptional adhesion

rolling in the rubber

In the prior art, the entire inclined surface on the kneading chamber 33 side which is in contact with the rubber is formed as a curved surface which is smooth throughout. In this regard, in the door of the present invention, the inclined surface on the side of the kneading chamber 33 that is in contact with the rubber is similar to that of Figs 2 Outer molds 1 to 9 shown are formed so as to form from the door bottom corner part 32a toward the door top part the first arcs 1a to 9a which are recessed downward until they reach the central portion and between the central portion Section and the upper door part 32b has the two straight lines 1b to 9b and 1c to 9c inclined at different angles with respect to the horizontal direction. When the door upper part side is formed with the plurality of straight lines inclined at different angles with respect to the horizontal direction, the rubber may back up in the chamber 31 (in the kneading chamber 33) near the door to some extent. Accordingly, the rubber can be suppressed from being rolled into the rotors 34 and 35 . That is, all of the nine doors in total of the outer molds 1 to 9 have a rubber roll-in suppressing effect, while the door having the prior art mold does not have the rubber roll-in suppressing effect. The evaluation is indicated in Table 1 by ◯ and ×.

rubber adhesion

The adhesiveness of the rubber on each of the doors was evaluated by conducting a flow analysis on the total of ten doors including the prior art. As shown in Table 1, the examination revealed that the rubber did not adhere to the door having the mold according to the prior art and the doors having the outer molds 1 to 4 and 6 to 9 of the embodiment of the invention . However, the inspection revealed that the rubber adhered to the door having the outer shape 5 of the embodiment of the present invention.

More preferable door shape

As for the shape of the door, as described above, the mountain-shaped outer shape of the door, when viewed in a longitudinally rectangular cross section, is designed to form an arc that is recessed downward from the door end lower corner part 32a toward the door upper part to it reaches an intermediate section, and has two straight lines inclined at different angles with respect to the horizontal direction between the intermediate section and the upper door part. Thus, the rubber can back up in the chamber 31 (in the kneading chamber 33) near the door to some extent. Accordingly, the rubber can be suppressed from being rolled into the rotors 34 and 35 .

Door that prevents rubber from rolling in and from sticking

Referring to the 2 until 4 describes the shape of the door that suppresses the rolling-in of the rubber and the sticking of the rubber. At this time, when viewed in a lengthwise rectangular cross section, the door-end corner lower part 32a is set as a starting point O, the horizontal direction is set as an x-axis, and a direction from the door-end corner lower part 32a to the door upper part in the horizontal direction is set as the positive side (see the x-axis arrow in the 3 and 4 ) of the x-axis. In addition, the vertical direction is set as a y-axis, a direction from the door-end lower corner part 32a to the door-upper part in the vertical direction is set as the positive side (see the arrow of the y-axis in Figs 3 and 4 ) of the y-axis is set, and the horizontal distance between the starting point O and the upper door part is set as L. In the outer shapes 1 to 9, a range of 0≦x≦0.5L is set as the arcs 1a to 9a, a range of 0.5L≦x≦0.75L is set as the straight lines 1b to 9b, and a range of 0.75L≦x≦L is set as the straight lines 1c to 9c.

Regarding the adhesion of the rubber to the door, the shape of the door has a large effect in a range of 0 ≤ x ≤ 0.5L, and in a range of 0.5L ≤ x ≤ 0.75L and 0.75L ≤ x ≤ L For example, the closer the side to the upper part of the door, the smaller the effect of the door shape on the ease of adhesion of the rubber.

θ: Neigungswinkel einer Tangente eines Kreises, der einen Radius R mit einer Rotationsmitte C des Rotors des Kautschukkneters 100 als Mitte hat und durch einen Startpunkt O geht, im Startpunkt O bezüglich der horizontalen Richtung (siehe 3)
R: Radius des Kreises, der durch den Startpunkt O mit der Rotationsmitte C des Rotors des Kautschukkneters 100 als Mitte geht (siehe 3), und Radius des kreisförmigen Teils der Innenwandfläche der Kammer 31 (siehe 1)In the door capable of suppressing the rubber from adhering to the surface of the door, the outer shape of the door is formed in a range of 0≦x≦0.5L as an arc passing through a zone in which the following Formula (I) is satisfied, and has a constant curvature. Incidentally, in the range of 0≦x≦0.5L, the external shape may be formed not only as a single arc but also as a plurality of arcs passing through a zone in which the following formula (I) is satisfied. $$\begin{array}{l}\sqrt{1.11{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-\frac{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2}{1+ta{n}^2\left(\theta +90°\right)}}-\sqrt{1.11{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-{\left(x+\frac{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="DE102018101541B4\_0007.png,DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}\le \hfill \\ \text{y}\le \sqrt{0.82{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-\frac{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2}{1+ta{n}^2\left(\theta +90°\right)}}-\sqrt{0.82{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-{\left(x+\frac{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="DE102018101541B4\_0007.png,DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}\hfill \end{array}$$

θ: Inclining angle of a tangent of a circle having a radius R centered on a rotation center C of the rotor of the rubber kneader 100 and passing through a starting point O at the starting point O with respect to the horizontal direction (see 3 )
R: Radius of the circle passing through the starting point O with the center of rotation C of the rotor of the rubber knee ters 100 as middle goes (see 3 ), and radius of the circular part of the inner wall surface of the chamber 31 (see 1 )

The formula of the arc on the left in the formula (I) is a formula of the partial arc of the circle having the center S1 and the radius 1.05R and represented by the solid line in 3 is shown. The formula of the arc on the right in the formula (I) is a formula of the partial arc of the circle having the center S2 and the radius 0.91R and represented by the solid line in 3 is shown. Incidentally, the center S1 of the circle having the radius 1.05R and represented by the solid line is an upper point among the two intersections of the straight line perpendicular to the tangent at the starting point O of the circle having the radius R with of the center of rotation C of the rotor and passing through the starting point O, and the circle having the radius 1.05R with the starting point O as the center and represented by a broken line. Also, the center S2 of the circle having the radius 0.91R and represented by the solid line is an upper point among the two intersection points of the straight line perpendicular to the tangent at the starting point O of the circle having the radius R with the center of rotation C of the rotor and passing through the starting point O, and the circle having the radius 0.91R with the starting point O as the center and represented by a broken line.

The formula of the arc on the left in the formula (I) is a formula of the arc using the arc 6c (see 2 ) of the outer form 6, and the formula of the arc on the right in the formula (I) is a formula of the arc including the arcs 2a, 8a and 9a (see 2 ) of the outer forms 2, 8 and 9 includes.

θ: Neigungswinkel der Tangente des Kreises, der den Radius R mit der Rotationsmitte C des Rotors des Kautschukkneters 100 als Mitte hat und durch den Startpunkt O geht, im Startpunkt O bezüglich der horizontalen Richtung (siehe 3)
R: Radius des Kreises, der durch den Startpunkt O mit der Rotationsmitte C des Rotors des Kautschukkneters 100 als Mitte geht (siehe 3), und Radius des kreisförmigen Teils der Innenwandfläche der Kammer 31 (siehe 1)Next, in the door that can suppress the rubber from sticking to the surface of the door, the outer shape of the door is formed in a range of 0.5L ≤ x ≤ 0.75L as a straight line passing through a zone, in which the following formula (II) is satisfied, and which is inclined with respect to the horizontal direction. $$\begin{array}{l}\text{tan}\left(\mathrm{\theta }+18°\right)\cdot \text{x}+\sqrt{1.11{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-\frac{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2}{1+ta{n}^2\left(\theta +90°\right)}}\hfill \\ \begin{array}{l}-\sqrt{1.11{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-{\left(\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+\frac{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="DE102018101541B4\_0007.png,DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}\text{tan}\left(\mathrm{\theta }+18°\right)\le \hfill \\ \text{y}\le \text{tan}\left(\mathrm{\theta }+25°\right)\cdot \text{x}+\sqrt{0.82{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-\frac{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2}{1+ta{n}^2\left(\theta +90°\right)}}\hfill \\ -\sqrt{0.82{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}^2-{\left(\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+\frac{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="DE102018101541B4\_0007.png,DE102018101541B4\_0008.png"\; state="\{\{state\}\}">R</figure-callout>}}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}-\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="DE102018101541B4\_0008.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}\text{tan}\left(\mathrm{\theta }+25°\right)\hfill \end{array}\hfill \end{array}$$

θ: Inclination angle of the tangent of the circle centered on the radius R centered on the rotation center C of the rotor of the rubber kneader 100 and passing through the starting point O at the starting point O with respect to the horizontal direction (see 3 )
R: Radius of the circle passing through the starting point O centered on the rotation center C of the rotor of the rubber kneader 100 (see 3 ), and radius of the circular part of the inner wall surface of the chamber 31 (see 1 )

Incidentally, the formula of the straight line on the left in the formula (II) gives the straight line 6b (see 2 ) of the outer form 6, and the formula of the straight line on the right side of the formula (II) gives the straight lines 2b, 8b and 9b (see 2 ) of the outer forms 2, 8 and 9.

θ: Neigungswinkel der Tangente des Kreises, der den Radius R mit der Rotationsmitte C des Rotors des Kautschukkneters 100 als Mitte hat und durch den Startpunkt O geht, im Startpunkt O bezüglich der horizontalen Richtung (siehe 4)
b1: Achsenabschnitt (y-Koordinate des Achsenabschnitts) (siehe 4) einer Geraden, die durch einen unteren Punkt P1 unter zwei Schnittpunkten des Kreises, der einen Radius 0,97R mit der Rotationsmitte C des Rotors als Mitte hat, und einer Geraden x = L, die durch den oberen Türteil geht, geht und einen Gradienten von tan(θ+45°) hat
b2: Achsenabschnitt (y-Koordinate des Achsenabschnitts) (siehe 4) einer Geraden, die durch einen unteren Punkt P2 unter zwei Schnittpunkten des Kreises, der den Radius 1,05R mit der Rotationsmitte C des Rotors als Mitte hat, und der Geraden x = L, die durch den oberen Türteil geht, geht und einen Gradienten von tan(θ+41°) hatNext, in the door capable of suppressing the rubber from adhering to the surface of the door, the outer shape of the door is formed in a range of 0.75L≦x≦L as a straight line passing through a zone where the following formula (III) is satisfied, and which is inclined with respect to the horizontal direction. Incidentally, in the range of 0.75L ≤ x ≤ L, the external shape does not have to be formed as a single straight line but may be formed as a plurality of straight lines passing through a zone in which the following formula (III ) is satisfied. $$\text{tan}\left(\mathrm{\theta }+41°\right)\cdot \text{x}+\text{<figure-callout id="2" label="b" filenames="DE102018101541B4\_0008.png" state="{{state}}">b</figure-callout>}2\le \text{y}\le \text{tan}\left(\mathrm{\theta }+45°\right)\cdot \text{x}+\text{<figure-callout id="1" label="b" filenames="DE102018101541B4\_0007.png,DE102018101541B4\_0008.png" state="{{state}}">b</figure-callout>}1$$

θ: Inclination angle of the tangent of the circle centered on the radius R centered on the rotation center C of the rotor of the rubber kneader 100 and passing through the starting point O at the starting point O with respect to the horizontal direction (see 4 )
b1: Intercept (y-coordinate of the intercept) (see 4 ) a straight line passing through a lower point P1 under two intersections of the circle having a radius 0.97R centered on the center of rotation C of the rotor and a straight line x = L passing through the upper part of the door, and a gradient of tan(θ+45°).
b2: Intercept (y-coordinate of the intercept) (see 4 ) a straight line passing through a lower point P2 under two intersections of the circle having the radius 1.05R centered on the center of rotation C of the rotor and the straight line x = L passing through the upper part of the door, and a gradient of tan(θ+41°).

Incidentally, the straight line x=L passing through the upper part of the door described above is a perpendicular bisector of the line connecting the centers of the two rotors 34 and 35. In addition, the formula of the straight line on the left in the formula (III) gives the straight line 7c (see 2 ) of the outer shape 7, and the formula of the straight line on the right side in the formula (III) gives the straight line 9c (see 2 ) of the outer form 9.

Finally, in the shape of the door that can suppress the rubber from being rolled into the rotors 34 and 35 and adhering to the surface of the door, the shape of the door refers to the mountain-shaped portion of the door. The outer shape in a range of 0≦x≦0.5L is formed as at least one arc passing through a zone where the above-described formula (I) is satisfied and having a constant curvature. The outer shape in a range of 0.5L≦x≦0.75L is formed as a straight line that passes through a zone where the above-described formula (II) is satisfied and that is inclined with respect to the horizontal direction. The outer shape in a range of 0.75L≦x≦L is formed as at least one straight line that passes through a zone where the above-described formula (III) is satisfied and that is inclined with respect to the horizontal direction.

Thermometer mounting on door

Referring to the 5 and 6 the attachment of a thermometer 40 to the door 32 is described. As in the 5 and 6 1, the longitudinally middle portion of the upper door part 32b is formed as a recessed part 38. As shown in FIG. A hole 39 is opened in the portion of the recess part 38, and in the hole 39 the thermometer 40 is inserted and fixed (provided). As in 5 As shown, the portion of the recess part 38 is formed as a curved surface.

When viewed in a lengthwise rectangular cross section, the mountain-shaped outer shape 1 of the door 32 in the portion without the recess part 38 is formed over the entire longitudinal length of the door 32 with the arc 1a and the two straight lines 1b and 1c. The thermometer 40 is provided so that it does not protrude upward from the door upper part 32b.

With the configuration described above, the rubber in the vicinity where the thermometer 40 is provided in the door 32 can be prevented from sticking.

modification

At the door of the in 2 In the illustrated embodiment, the outer shape thereof changes in the horizontal direction from the door-end lower corner part 32a to the door upper part at a position 0.5L from arc to straight. At a position 0.75L the gradient of the straight line changes. The position where the arc changes to straight may be slightly different from the 0.5L position. Also, the position where the gradient of the straight line changes may be slightly different from the 0.75L position.

Claims (5)

A door (32) which opens and closes a discharge port (37) formed in a bottom part of a chamber (31) of a rubber kneader (100) and a side of which inserted into the chamber (31) has a symmetrical mountain shape, characterized in that the Mountain-shaped outer shape (1) when viewed in a longitudinally rectangular cross-section is designed to protrude from a door lower end neck part (32a), which is in contact with an inner opening end of the discharge port (37), toward a door upper part (32b) which is highest in a vertical direction, an arc (1a) which is recessed downward until it reaches a middle section, and has a plurality of straight lines (1b, 1c) inclined at different angles in a horizontal direction between the middle section and the upper door part (32b). door (32). claim 1 which opens and closes the discharge port (37) of the rubber kneader (100) when viewed in a longitudinally rectangular cross section in a case where the door end corner lower part (32a) is set as a starting point (O), the horizontal direction is set as an x-axis, a direction from the door bottom corner part (32a) to the upper door part (32b) in the horizontal direction is set as a positive side of the x-axis, the vertical direction is set as a y-axis, one direction from the lower door end corner part (32a) to the upper door part (32b) in the vertical direction is set as a positive side of the y-axis and a horizontal distance between the starting point (O) and the upper door part (32b) is set as L, the outer shape (1) is formed in a range of 0≦x≦0.5L as at least one arc (1a) passing through a zone where the following formula (I) is satisfied and having a constant curvature, mi t: $$\begin{array}{l}\sqrt{1.11R^2-\frac{R^2}{1+ta{n}^2\left(\theta +90°\right)}}-\sqrt{1.11R^2-{\left(x+\frac{R}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}\le \hfill \\ \text{y}\le \sqrt{0.82R^2-\frac{R^2}{1+ta{n}^2\left(\theta +90°\right)}}-\sqrt{0.82R^2-{\left(x+\frac{R}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}\hfill \end{array}$$

θ: inclination angle of a tangent of a circle centered on a rotation center (C) of a rotor (34, 35) of the rubber kneader (100) and passing through the starting point (O) at the starting point (O) with respect to the horizontal direction R: radius of the circle passing through the starting point (O) centered on the rotation center of the rotor (34, 35) of the rubber kneader (100) and radius of a circular part of an inner wall surface of the chamber (31). door (32). claim 2 , which opens and closes the discharge port (37) of the rubber kneader (100), wherein, in a range of 0.5L≦x≦0.75L, the outer shape (1) is formed as a straight line (1b) passing through a zone in which the following formula (II) is satisfied and which is inclined with respect to the horizontal direction, with: $$\begin{array}{l}\text{tan}\left(\mathrm{\theta }+18°\right)\cdot \text{x}+\sqrt{1.11R^2-\frac{R^2}{1+ta{n}^2\left(\theta +90°\right)}}\hfill \\ \begin{array}{l}-\sqrt{1.11R^2-{\left(\frac{L}{2}+\frac{R}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}-\frac{L}{2}\text{tan}\left(\mathrm{\theta }+18°\right)\le \hfill \\ \text{y}\le \text{tan}\left(\mathrm{\theta }+25°\right)\cdot \text{x}+\sqrt{0.82R^2-\frac{R^2}{1+ta{n}^2\left(\theta +90°\right)}}\hfill \\ -\sqrt{0.82R^2-{\left(\frac{L}{2}+\frac{R}{\sqrt{1+ta{n}^2\left(\theta +90°\right)}}\right)}^2}-\frac{L}{2}\text{tan}\left(\mathrm{\theta }+25°\right)\hfill \end{array}\hfill \end{array}$$

θ: inclination angle of the tangent of the circle centered on the rotating center (C) of the rotor (34, 35) of the rubber kneader (100) and passing through the starting point at the starting point (O) with respect to the horizontal direction R: radius of the circle, passing through the starting point (O) centered on the rotation center (C) of the rotor (34, 35) of the rubber kneader (100), and radius of the circular part of the inner wall surface of the chamber (31). door (32). claim 3 which opens and closes the discharge port (37) of the rubber kneader (100), wherein the outer mold (1) is formed in a range of 0.75L ≤ x ≤ L as at least one straight line (1c) passing through a zone, in which the following formula (III) is satisfied and which is inclined with respect to the horizontal direction, with: $$\text{tan}\left(\mathrm{\theta }+41°\right)\cdot \text{x}+\text{b}2\le \text{y}\le \text{tan}\left(\mathrm{\theta }+45°\right)\cdot \text{x}+\text{b}1$$

θ: inclination angle of the tangent of the circle centered on the rotation center (C) of the rotor (34, 35) of the rubber kneader (100) and passing through the starting point at the starting point (O) with respect to the horizontal direction b1: intercept of a straight line, passing through a lower point (P1) under two intersections of a circle having a radius 0.97R centered on the center of rotation (C) of the rotor (34, 35) and a straight line x = L passing through the upper door part ( 32b) goes, goes and has a gradient of tan(θ+45°) b2: Intercept of a straight line passing through a lower point (P2) between two points of intersection of a circle having a radius 1.05R with the center of rotation (C) of the rotors (34, 35) as a centre, and a straight line x = L passing through the upper door part (32b) and having a gradient of tan(θ+41°). Door (32) after one of Claims 1 until 4 which opens and closes the discharge port (37) of the rubber kneader (100), wherein a longitudinally middle portion of the upper door part (32b) is formed as a recess part (38), in the recess part (38) a thermometer (40) is provided and the mountain-shaped outer shape (1) is configured to have the arc (1a) and the plurality of straight lines (1b, 1c) when viewed in a longitudinally rectangular cross section in a portion without the recess part (38).

Images